This Venture Pal Lightweight Packable Travel Hiking Backpack Daypack is made with high quality tear and water resistant material, provides extra strength and long-lasting performance with the lightest weight possible. The extra strength provided by the double-layer bottom piece makes it very convenient to carry more load on your journeys. Heavy duty two-way SBS metal zippers across the backpack are convenient to operation on whichever side you prefer. Longevity is further enhanced by bar-tacks at major stress points.